VoIP(SIP),UMTS conversion.(MV-370U) for all world and Japan (SoftBank Mobile,Docomo)MV-370U: mobile to lan 2 stage dialing-free mode. When calling party call MV-370U sim card,the calling party will hear dial tone and enter any destination number. **How to differentiate mobile to lan-2 stage dialing is available?** UMTS Mobile call UMTS Mobile: when the called party answer, the calling party press any DTMF.If the called party hear DTMF Voice,this feature is available;contrariwise**

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